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Anthropic1M context
Claude Opus 5.5
A 1M-token frontier model for review, architecture, and work where the cost of a plausible-but-wrong answer is high. Strong at reading before writing.
Rate card
Input / 1M0.209
Output / 1M1.04
Cache read / 1M0.01
Official price$4 / $20
1M in + 250K out$0.4698
94.8% below official pricing
Official prices are the vendor's published rates on 3 Nov 2026. Synthetic usage is for illustration. Charges settle against the reported token count.
Use it
The same key and endpoint shape work for every model on RelayTokens. Switch models by changing one field.
Review
Architecture
Writing
Python
from openai import OpenAI
client = OpenAI(
base_url="https://relaytokens.xyz/v1",
api_key="rt_live_your_key",
)
response = client.chat.completions.create(
model="claude-opus-5-5",
messages=[{"role": "user", "content": "Start with the constraint."}],
)Put Claude Opus 5.5 on the meter.
Prepaid balance. No subscription. No KYC.